Arc-lamp.



R. H. PYLE.

ARC LAMP.

APPLICATION FILED 001e, 1907.

937,386. Patented 0st. 19, 1909.

3 SHEETS-SHEBT 1.

1 1 WITNESSES: I [N VENTOR.

2% W Robert H.P l.

7L. Y B

A TTOANEY.

R. H. PYLE.

ARG LAMP.

APPLIOATION FILED 001'. 9, 1907.

937,386. w Patented 0ct.19,1909.

3 SHEETS-SHEET 2.

I N VEN TOR.

WITNESSES:

W M Robert H.P l

ATTORNEY.

R. H. PYLE.

ARC LAMP.

APPLICATION FILED 001'. 9, 1907.

Patented Oct. 19,1909.

3 SHEETS-SHEET 3.

[.VVENTOR. RoLentH-Pyle ID-fiu.

lV/TNESSES:

A TTORNEY.

ROBERT H. PYLE, OF INDIANAPOLIS, INDIANA.

ARC-LAMP.

Specification of Letters Patent.

Patented Oct. 19, 1909.

Application filed October 9, 1967. Serial No. 396,678.

To all whom it may concern:

Be it known that I, ROBERT H. PYLE, of Indianapolis, county of Marionand State of Indiana, have invented a certain new and useful Arc-Lamp;and I do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,in which like letters refer to like parts.

The object of this invention is to improve the construction of clutchesin are lamps for holding and regulating the movement of the upperelectrode and to that end one feature of my invention consists in what Icall a ball clutch, namely, a ball mounted loosely in an inclined recessin the side of the clutch ring and adjacent the upper electrode when theparts are in place, the arrangement being such that the gravity of theball will cause it to wedge between the clutch ring and electrode andtherefore clutch the electrode and hold it in its elevated position.Alongwith the foregoing I provide means for releasing said ball clutch,namely, a pin adapted to engage the ball as the clutch ring movesdownwardly with the electrode for dislodging the ball from its clutchingposition so that the electrode ma 1 drop. Along with the foregoing thereis a springpressed means provided for holding the ball down in clutchingposition.

The features of this invention will be more fully understood from theaccompanying drawings and the following description and claim. I

In the drawings Figure 1 is a side elevation of an arc lamp embodying myinvention, parts being broken away. I do not, however,'wish to belimited to the use of my invention with a lamp constructed in anyparticular way so far as the other features of the lamp outside of myinvention are concerned. Fig. 2 is a side elevation of the clutch andupper electrode showing the parts of the clutch in posit-ion and partsbeing broken away. Fig 3 is the same as Fig. 2, showing the clutchreleased and not in clutching position. Fig. 4 is a horizontal sectionon the line 44 of Fig. 3 with the electrode removed and the ball in thelower end of theball recess. Fig. is an elevation of the upper electrodeholding a clutching means showing the reverse side thereof as comparedwith Fig. 2 and parts being broken away, the clutch being shown inoperating condition. Fig. 6 is a horizontal section on the line 66 ofFig. 1. Fig. 7 is a vertical section on the line 77of Fig. 1.

Referring to the details of the construction illustrated, there is showna lamp frame 10, which, however, may be of any type,

for guiding it on the bracket 20 which is.

secured to the vertical bar 12. The bar 12 has a vertical slot 22 nearits lower end in which the lug 23 projects from the clutch ring 24. Acotter pin 25 or the like, through the lug 23, holds the clutch. ring,and the arrangementpermits the vertical movement of the clutch ring. Theclutch ring loosely surrounds the upper electrode and has in the innerwall thereof a recess 26 for the clutch ball 27. The recess is inclinedupwardly away from the hole through the clutch ring for the electrode sothat when" the ball is in the upper end of the recess, it will disengagethe electrode, and when in the lower end of the recess, it will projectinto the hole for the electrode and engage and clutch the electrode. Thelower end of the recess is reduced so the ball cannot escape. Aclutchreleasing pin 28 projects up... from the ring 15 into the recess26 for engagingthe balls '27 when the electrode and clutch ring movedownwardly far enough to permit this result. A rod 29 is secured at itslower end to the clutch ring 24 and at its upper end to the slide 19.This rod 29 is to move the clutch ring 24 in response to the action ofthe solenoid. There is also a rod 32 that at its lower end projects intothe upper part of the ballrecess 26 and at its upper end extends looselythrough a hole in the bracket 20 and the spring 33 is coiled around saidrod immediately below said bracket and above the disk 34:. -The functionof this spring-controlled rod 32 is to positively dislodge and pushdownward the ball 27 into clutching position and yet permit the ball torecede or move upward when pushed upward by the pin 28. The wiring is ofthe usual form,

- the arc lengthens the current will weaken,

there being the wire running to the bind ing post 41, a wire 42 to theupper electrode clamp 14, a wire 43 from the lower electrode holder 44to the solenoid, a wire 45 from the solenoid to the binding post 41, anda wire 46 therefrom.

In operation, before the current is turned on, the upper electrode restsupon the lower electrode and the clutch mechanism is in the positionshown in Fig. 3, that is in disengaging position. As soon as the currentis turned on, the core of the solenoid moves downwardly and aetuates thelever 18 so that it will elevate the clutch ring 24 to the positionshown in Fig. 2, and that elevates the upper electrode to establish theare. As

and through the solenoid will permit the gradual downward movement ofthe clutch ring and upper electrode until the ball comes in contact withthe clutch-releasing pin-5128. Thereafter the parts remain substantiallyin that position. When the arc becomes too long, the clutch drops downslightly and the ball is moved slightly upward by the pin 28 so as toslightly disengage the upper electrode and permit it to move downwardlyvery slightly and shorten the arc, and then the slight increase ofcurrent will slightly elevate the clutch and electrode, so that there issubstantially uniform interplay between the pin 28 and the ball 27 ofthe clutch,

whereby the upper electrode. is gradually fed downwardly as it isconsumed, and yet I the length of the arc is maintained substantiallyuniform.

In the drawings there is shown a base 50 with a post 51 for the lowerelectrode and a post for a reflector 53. There is also a spring 54 froma bracket 55 on the post 10 that runs to the lever 18.

What I claim as my invention and desire to secure by Letters Patent is:

In an arc lamp, a clutch ring adapted to surround the upper electrode,and with a recess in the inner wall thereof that inclines downwardlytoward the electrode, a ball fit ting in said recess that when in thelower part of said recess projects beyond the inner wall of the clutchring in position to clutch the electrode, means controlled by thecurrent through the lamp for elevating said clutch to the clutchingposition, a statlonary bar beside the electrode with .a ringon the lowerend thereof surrounding the electrode, and a pin extending upwardly fromsaid ring and adapted to enter the ball'recess in the clutch ring whensaid clutch ring moves downwardly, whereby said pin will disengage theball from the clutching position.

In witness whereof, I have hereunto affixed my signature in the presenceof the witnesses herein named.

ROBERT H. PYLE.

Witnesses:

N. ALLEMoNG, W. M. GENTLE.

